Toothbrush assembly



FIG. 1 is a front elevational view of a toothbrush assembly showing my new design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a left end view thereof;

FIG. 4 is a right end view thereof;

FIG. 5 is a plan view thereof;

FIG. 6 is a bottom view thereof FIG. 1; and

FIG. 7 is a perspective view thereof. 

The ornamental design for a toothbrush assembly, as shown. 